Kompass

Glossary Customer due diligence

Financial crime and AML

Customer due diligence (CDD)

Identifying and verifying a customer and the people behind them, understanding the purpose of the relationship, and monitoring it over time, with the depth of checks matched to risk.

In plain English

Customer due diligence (CDD) has four building blocks: identify the customer and verify their identity; identify and take reasonable steps to verify the beneficial owner; understand the purpose and intended nature of the relationship; and carry out ongoing due diligence and monitoring.

The depth of checks should match the risk. Higher-risk customers receive enhanced due diligence (EDD): more information, more senior approval and closer monitoring. Where the law allows and risk is demonstrably low, simplified measures may be applied.

Why it matters to a board

The board approves the risk appetite that decides who the institution will and will not serve, and should see evidence that high-risk relationships really are treated differently.

Common mistakes

  • Applying the same checks to every customer.
  • Not documenting why a customer was rated lower risk.
  • Treating enhanced due diligence as more paperwork instead of more understanding.

What the standards and regulators say

Related terms

Sources last checked: 5 October 2026. General information, not legal, regulatory or professional advice. Requirements change, so confirm the current text before relying on any point. Spotted an error? Tell us.